Can someone me with this?
find the roots of -x^2-20=-x^4

The roots are

Step-by-step explanation:

The equation is

Switch sides, we get,

Adding both sides by 20, we get,

Adding both sides by ,

To solve this equation, let us assume and

Thus, rewriting this equation,

Using quadratic formula, we get the value of u.

The variable u has two solutions,

and

Since, and

Thus, substituting the u-values, we get,

and

Thus, the roots are  

360 different combinations

£56

step-by-step explanation: